Improvement in gates for turbine water-wheels



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Stimmt A. rnnSooTT,or SUTTON, MASSACHUSETTS.

Leners mentito. 112,956, dated March 21, 1871.

IMPROVEMENT IN GATES FOR TURBINE WATER-WHEELS.

The Schedule :efened to in these Letters Patent and making ai the lame.

To all whom it may concern;

Be it known that I, SAMUEL A. PnnscoTT, of Sutton, in the county of Worcester and State of' Massa- Figure 2 represents a halt' plan half sectional view' of the same with the sluices open; and

Figure 3 represents a similar view with the sluices closed.

To enable those skilled in the art to which my invention belongs to make and use the same, I will proceed to describe it'more in detail.

The'nature of my invention consists in certain improvements in gates for regulatingr the flow of water for turbine wheels, as hereafter explained.

In the drawingv .'lhepart marked A represents the curbing, by which the wheel is nclosed or surrounded.

It is provided with suitable openings to admit the water to the wheel, and is also provided with an-annular horizontal flange, a, which rests upon the bottom of the flume, and supports the curbing and wheel when set up for service. l Ig indicates a cap, which covers the top of the wheel; an

b, the opening for the shaft or spindle.

The cap B is secured vvto the curbing A by means of a series of screw-bolts, C, arranged through the flange e of the cap B and the ilauge a-of the curb, as indicated.

A Series of guide-plates, D, is rigidly secured in a vertical position between the anges a and c; Said plates D extend in through the curb A, to which their inner ends are attached.

The plates D form one side of the sluice-ways, and

are set at such an inclination as to direct the streams of water against the buckets oi' theA wheel at the proper angle.

V'Ihe plates D may be made thick enough to receive the bolts O, and said bolts maybe passed down through the plates instead of at one side, as indicated.

The gate is made in the form of a ring, which surrounds the curb A between the flanges a and c. It

consists of t`wo annular iangcs, E and F, joined to each other at their inner edges, next to the curb A, by vertical bars, e, so as to leave openings to correspond in number with the openings in the curb A.

The guide-plates D are reduced at top and bottom,

to allow space for the flanges E and F, and permit of` the latter being moved around for opening or closing the sluices.

Beveled or inclined lugs, I, are secured to the ontside of the vertical bars e by means of screws-or bolts J. These lugs` are provided with inward-projecting y tongues, w, which extend into the openings inthe curb A and form the backs of the sluice-ways.

' The inclination of the end ofthe lugs I and their tongues is such that, when moved up against the plates D, the lugs and plates it accurately togetherand close the sluices, as indicated in iig. 2 ofthe drawing.

, The gate-ring can be moved around for opening or closing the sluices by means of the stud K, which projects ,up through theV flange c, and any' suitable device may be connected therewith to facilitate the operation.

The water is'admitted to the wheel between the faces o f the lugs .I and guide-.plates D, which parts form smooth rectangular prismatic orilices, through which the water ows,'and is directed againstthe buckets of the wheel in clearcompacted streams, whether .the sluices beopened much or little, and always at the same angle of impingement.

Thus it will be seen that the elec't is proportionately the same with the gate partially opened-as it is with the gate opened to its full extent.

From the foregoing description it will be seen tha by my improvement an important result is accom; plished, while at the same time the devices of my gate are simple and 'are not liableto get out of, order.

Having' described my vimprovements in gates for turbine water-wheels,

1vVhat I claim therein as new and of my invention= and desire to Secure by Letters Patent, is

he combination, with the curb A, and cap B provided with flanges a c, ofthe gate-ring E F e, stationary guide-plates D, and tongued lugs I tw, substan.

tially as and for the purposes set forth.

SAMUEL A. PRESCOTT.

Witnesses:

CEAS. H`. BURLEIGH, A. P. FAIRBANKS. 

